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Originally Posted by wnmnkh /img/forum/go_quote.gif
Tyll, are un-balanced HD650's and balanced HD650's same? I can't find un-balanced HD650 on the option.
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I think this got fixed, here's the graph.
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Originally Posted by Duggeh /img/forum/go_quote.gif
Isolation specs are different for the same headphone in balanced and unbalanced configurations. Probably caused by not having the headphones mounted in identical position to the other test.
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Yup...sort of. One of the problems with our isolation measurement is that there is a single speaker that is the sound source in an anechoic chamber. This causes some discrete audio paths to the ear that may resonate. It would be better if we did the isolation measurement in a "live" concrete room with 8 speakers in the corners exciting and reverberating throught the entire space creating a diffuse field of noise.
They're pretty close though.
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Originally Posted by pompon /img/forum/go_quote.gif
Balanced 650 ... no idea what cable they took!
I want to see HD650 with stock cable and HD650 with Equinox cable to see what happening with the graph!
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Originally Posted by CompressionalFlagellation /img/forum/go_quote.gif
Testing different cables on the same headphone might help settle this argument. I'm not trying to destroy anyone's cable business here, I just want some objective truth. Thanks.
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I tell you what, after we get the straight up measurements working, I'll work on doing some experiments that I post here. I'll do different cables, but I'll also do stuff like measuring headphones on different positions on the head, and the Grados with all the different pads. But for the moment I need to get the basic stuff up. Good idea though!
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Originally Posted by janderclander14 /img/forum/go_quote.gif
The Dt990 (2005) measurements which were available in the old version seem to have disappeared in the new one. Is it possible to at them?
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The old data doesn't work with the new data set (different number of samples), and we have to measure the headphones we carry first.
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Originally Posted by TheSloth /img/forum/go_quote.gif
Let's not turn working for better and more meaningful measurements into an argument about finding the 'truth'.
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Yupper, there are two truths here: the objective measureable truths; and what you hear. The two are related---measurements will tell you when there's more bass, or when there frequency response is wiggly and therefore has problems---but measurements won't tell you if you hear somethings as "deeper" or more "airy." I can tell you though that the better the headphones measure, the better they generally sound. That's for sure.
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Originally Posted by CompressionalFlagellation /img/forum/go_quote.gif
I'm just curious if there's anyway to get close to the facts surrounding what various cables do to an audio signal.
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There is test gear specifically designed for testing cables (they test for reflections and group delays and such), but those effects are far to small to be seen buried in the noise and much grosser features of the kinds of test we do on headphones.
I'll still give them a go, but I really doubt you'll see anything definitive.
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Originally Posted by mulveling /img/forum/go_quote.gif
Hah, the W5000 frequency response looks terrible. I bet your dummy head had the same fit problems with these cans that I did!
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Could be, but Darren works pretty hard to get a good seal. He knows what to look for. He's going to be cruising this thread for info, I'll ask him about remeasureing the W5000.
They've got other problems though.
BTW the D5000 and D7000 were remeasured and the measurements are up.
So that just shows to go you, there's hardly any measurable difference (at least with this type of measurement) between balanced and unbalanced, yet we all know that it makes a fairly easily audible change to hear.